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4 years ago

What number makes a perfect square?

Mathematics

2 answers:

GREYUIT [131]4 years ago

7 0

Four males a perfect square

Kobotan [32]4 years ago

6 0

The number four make a perfect square

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Roberto wrote a sentence that describes an equation.

tresset_1 [31]

The last one: x/2=45; x = 90
the problem says: half of a number is 45.

let's use x to represent this number
we know that dividing by 2 halves a number, so, x/2 = 45

to get x alone, we multiply 2 by 2 to cancel it out. so, multiply by 2 on both sides

x/2 • 2 = 45 • 2

x = 90

hope this helped!

3 0

3 years ago

Read 2 more answers

Weights of female cats of a certain breed are normally distributed with mean 4.1 kg and standard deviation 0.6 kg.

Diano4ka-milaya [45]

The proportion is 0.4401.

We find z-scores that correspond with both ends of this interval. Z-scores are given using the formula:

$z=\frac{X-\mu}{\sigma}$

For the lower end,

$z=\fracc{3.7-4.1}{0.6}=\frac{-0.4}{0.6}=-0.67$

The proportion of scores to the left of this number is 0.2514.

For the higher end, the z-score is

$z=\frac{4.4-4.1}{0.6}=\frac{0.3}{0.6}=0.5$

The proportion of scores to the left of this number is 0.6915.

To find just the proportion of scores between these two, we subtract;

0.6915-0.2514 = 0.4401.

3 0

3 years ago

If f(x)=2x^2-5and g(h)=3x+3 find f-g (x)

sammy [17]

$(f-g)(x)=f(x)-g(x)\\\\\text{We have}\ f(x)=2x^2-5\ \text{and}\ g(x)=3x+3.\ \text{Substitute:}\\\\(f-g)(x)=(2x^2-5)-(3x+3)=2x^2-5-3x-3=2x^2-3x-8\\\\Answer:\ \boxed{(f-g)(x)=2x^2-3x-8}$

7 0

3 years ago

Consider the hypothetical study described below. Based solely on the information given, do you have reason to question the resu

elena-14-01-66 [18.8K]

Answer:

(B) Yes, there is reason. The TV audience might not be representative of the population.

(E) Yes, there is reason. Call-in polls tend to be biased.

Step-by-step explanation:

According to the information given we might consider two answers.

The first answer is:

<em>(B) Yes, there is reason. The TV audience might not be representative of the population.</em>

Let's remember that for a sample to be representative of a population must be random and every person must have the same probability of being selected. Here, the question is targeted only to the TV show's audience, so the results can only be interpreted for this segment of the population.

<em>(E) Yes, there is reason. Call-in polls tend to be biased.</em>

The risk is that the people who call might be influenced by the show itself and would not give an unbiased answer. This creates a bias on the sample. Besides, as stated before, not all the elements of the population can be part of the sample.

5 0

4 years ago

Four times the sum of a number and -3 is 28

tatuchka [14]

Answer:

The number is equal to 10

Step-by-step explanation:

Let x be the number

4(x-3)=28

x-3=7

x=10

8 0

3 years ago